A new propulsion concept of 2 D C D vectoring nozzle was proposed, which had a convergent duct shaped by spheric surface and a divergent one with rectangular transverse section.
提出了一种二元收扩矢量喷管的概念，用热射流实验台对二元矢量喷管进行了过膨胀状态下的喷管模型热态实验。
However, facts A, B, and C are never used again; they were instrumental to the argument because they allowed one to establish D, but once D is established, A, B, and C can be safely forgotten.
然而，A,B和C再也没有被使用到；他们只是辅助性的证明，因为它们被用来建立D，然而一旦D被建立起来后，A,B,C可以被毫无顾虑地忘掉。
D Because if I have equal amounts of a, B, c, and d, that's a lot of entropy of mixing there.
因为如果我们有等量的A,B,C和，那么混合熵会很大。
The whole thing thus boils down to solving 5c"+d'=54 and c"d'=144, which means that c" is solution of x(54-5x)=144 or 5x2-54x+144=0.
所有的事情都归结于解方程组5c"+d'=54,c"d'=144,即表示c''是x(54-5x)=144或 5x2-54x+144=0的解。
It was found that the tabs fixed on C-D nozzles also enhanced the jet mixing distinctly, although the boundary layers of the jets from C-D nozzles were greater than that from the convergent nozzle.
结果表明，对于收扩喷管，虽然其速度边界层厚度明显大于收敛喷管，但加装小突片结构也能够明显的强化射流的混合。
The first is Washington D. C. the nation's capital, which is a stateless limbo land between Maryland and Virginia. As D.
第一个是华盛顿特区美国国都，她位于马里兰州和弗吉尼亚州之间但边界很模糊。
There were significant differences of COR between group A and D and of bile production and COR between group C and D (P< 0.05), and there was no significant difference between group B and D.
组、D组耗氧率和C组、D组胆汁生成量及耗氧率的差异均有统计学意义（P<0.05），而B组、D组间各指标差异无统计学意义。
Xylose reductase(XR) is a key enzyme in D-xylose metabolism, catalyzing the reduction of D-xylose to xylitol. The reported xylose reductase from C.
木糖还原酶（XR）是D-木糖代谢途径中的关键酶，催化还原D-木糖成木糖醇。
PEF during the study period was significantly higher in Group C than that in Group D, and symptom score was significantly less in Group C than that in Group D.
治疗期间合用组最高呼气流速（PEF）显著高于单用组，而症状计分则少于单用组。
The paper presents the circuit structure type of the D. C. inductor in high power thyristor exciting system and the role of the D. C. inductor in the exciting current self-regulation control system.
本文论述了直流互感器在大功率晶闸管励磁系统中线路结构形式以及在激磁电流自动调节控制系统中所起的作用。
David Percival said that the purpose of this visit was to gain deep understanding of C&D Wines and C&D Co. , Ltd so as to explore cooperation opportunities.
庞大维表示，此次来厦访问的主要目的，是希望能够对建发酒业、建发集团有更深入的了解，以此寻求双方的合作契机。
The invention can realize the nondestructive copy, extend the operating life of the master C. D. and selecting the large numerical aperture to meet the requirement for copying C. D. with high density.
本发明可以实现无损复制，提高母盘的使用寿命，选用大的数值孔径，满足高密度光盘复制的需要。
The differences between group D(C)and B, A were statistically significant(P<0.05). But difference between D and C has no statistically significant.
D组与C组和第B、A组比较，有显著统计学差异（P<0.05），D组与C组两者之间并无明显统计学差异。
Day 15, Friday Chicago to Washington D. C. Washington D. C.
第十五日，周五芝加哥至华盛顿华盛顿。
Day 15, Friday Chicago to Washington D. C. Washington D. C.
第十五日，周五芝加哥至华盛顿华盛顿。
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